1/* 2 * Declarations of X.25 Packet Layer type objects. 3 * 4 * History 5 * nov/17/96 Jonathan Naylor Initial version. 6 * mar/20/00 Daniela Squassoni Disabling/enabling of facilities 7 * negotiation. 8 */ 9 10#ifndef _X25_H 11#define _X25_H 12#include <linux/x25.h> 13#include <linux/slab.h> 14#include <net/sock.h> 15 16#define X25_ADDR_LEN 16 17 18#define X25_MAX_L2_LEN 18 /* 802.2 LLC */ 19 20#define X25_STD_MIN_LEN 3 21#define X25_EXT_MIN_LEN 4 22 23#define X25_GFI_SEQ_MASK 0x30 24#define X25_GFI_STDSEQ 0x10 25#define X25_GFI_EXTSEQ 0x20 26 27#define X25_Q_BIT 0x80 28#define X25_D_BIT 0x40 29#define X25_STD_M_BIT 0x10 30#define X25_EXT_M_BIT 0x01 31 32#define X25_CALL_REQUEST 0x0B 33#define X25_CALL_ACCEPTED 0x0F 34#define X25_CLEAR_REQUEST 0x13 35#define X25_CLEAR_CONFIRMATION 0x17 36#define X25_DATA 0x00 37#define X25_INTERRUPT 0x23 38#define X25_INTERRUPT_CONFIRMATION 0x27 39#define X25_RR 0x01 40#define X25_RNR 0x05 41#define X25_REJ 0x09 42#define X25_RESET_REQUEST 0x1B 43#define X25_RESET_CONFIRMATION 0x1F 44#define X25_REGISTRATION_REQUEST 0xF3 45#define X25_REGISTRATION_CONFIRMATION 0xF7 46#define X25_RESTART_REQUEST 0xFB 47#define X25_RESTART_CONFIRMATION 0xFF 48#define X25_DIAGNOSTIC 0xF1 49#define X25_ILLEGAL 0xFD 50 51/* Define the various conditions that may exist */ 52 53#define X25_COND_ACK_PENDING 0x01 54#define X25_COND_OWN_RX_BUSY 0x02 55#define X25_COND_PEER_RX_BUSY 0x04 56 57/* Define Link State constants. */ 58enum { 59 X25_STATE_0, /* Ready */ 60 X25_STATE_1, /* Awaiting Call Accepted */ 61 X25_STATE_2, /* Awaiting Clear Confirmation */ 62 X25_STATE_3, /* Data Transfer */ 63 X25_STATE_4 /* Awaiting Reset Confirmation */ 64}; 65 66enum { 67 X25_LINK_STATE_0, 68 X25_LINK_STATE_1, 69 X25_LINK_STATE_2, 70 X25_LINK_STATE_3 71}; 72 73#define X25_DEFAULT_T20 (180 * HZ) /* Default T20 value */ 74#define X25_DEFAULT_T21 (200 * HZ) /* Default T21 value */ 75#define X25_DEFAULT_T22 (180 * HZ) /* Default T22 value */ 76#define X25_DEFAULT_T23 (180 * HZ) /* Default T23 value */ 77#define X25_DEFAULT_T2 (3 * HZ) /* Default ack holdback value */ 78 79#define X25_DEFAULT_WINDOW_SIZE 2 /* Default Window Size */ 80#define X25_DEFAULT_PACKET_SIZE X25_PS128 /* Default Packet Size */ 81#define X25_DEFAULT_THROUGHPUT 0x0A /* Deafult Throughput */ 82#define X25_DEFAULT_REVERSE 0x00 /* Default Reverse Charging */ 83 84#define X25_SMODULUS 8 85#define X25_EMODULUS 128 86 87/* 88 * X.25 Facilities constants. 89 */ 90 91#define X25_FAC_CLASS_MASK 0xC0 92 93#define X25_FAC_CLASS_A 0x00 94#define X25_FAC_CLASS_B 0x40 95#define X25_FAC_CLASS_C 0x80 96#define X25_FAC_CLASS_D 0xC0 97 98#define X25_FAC_REVERSE 0x01 /* also fast select */ 99#define X25_FAC_THROUGHPUT 0x02 100#define X25_FAC_PACKET_SIZE 0x42 101#define X25_FAC_WINDOW_SIZE 0x43 102 103#define X25_MAX_FAC_LEN 60 104#define X25_MAX_CUD_LEN 128 105 106#define X25_FAC_CALLING_AE 0xCB 107#define X25_FAC_CALLED_AE 0xC9 108 109#define X25_MARKER 0x00 110#define X25_DTE_SERVICES 0x0F 111#define X25_MAX_AE_LEN 40 /* Max num of semi-octets in AE - OSI Nw */ 112#define X25_MAX_DTE_FACIL_LEN 21 /* Max length of DTE facility params */ 113 114/* Bitset in x25_sock->flags for misc flags */ 115#define X25_Q_BIT_FLAG 0 116#define X25_INTERRUPT_FLAG 1 117#define X25_ACCPT_APPRV_FLAG 2 118 119/** 120 * struct x25_route - x25 routing entry 121 * @node - entry in x25_list_lock 122 * @address - Start of address range 123 * @sigdigits - Number of sig digits 124 * @dev - More than one for MLP 125 * @refcnt - reference counter 126 */ 127struct x25_route { 128 struct list_head node; 129 struct x25_address address; 130 unsigned int sigdigits; 131 struct net_device *dev; 132 atomic_t refcnt; 133}; 134 135struct x25_neigh { 136 struct list_head node; 137 struct net_device *dev; 138 unsigned int state; 139 unsigned int extended; 140 struct sk_buff_head queue; 141 unsigned long t20; 142 struct timer_list t20timer; 143 unsigned long global_facil_mask; 144 atomic_t refcnt; 145}; 146 147struct x25_sock { 148 struct sock sk; 149 struct x25_address source_addr, dest_addr; 150 struct x25_neigh *neighbour; 151 unsigned int lci, cudmatchlength; 152 unsigned char state, condition; 153 unsigned short vs, vr, va, vl; 154 unsigned long t2, t21, t22, t23; 155 unsigned short fraglen; 156 unsigned long flags; 157 struct sk_buff_head ack_queue; 158 struct sk_buff_head fragment_queue; 159 struct sk_buff_head interrupt_in_queue; 160 struct sk_buff_head interrupt_out_queue; 161 struct timer_list timer; 162 struct x25_causediag causediag; 163 struct x25_facilities facilities; 164 struct x25_dte_facilities dte_facilities; 165 struct x25_calluserdata calluserdata; 166 unsigned long vc_facil_mask; /* inc_call facilities mask */ 167}; 168 169struct x25_forward { 170 struct list_head node; 171 unsigned int lci; 172 struct net_device *dev1; 173 struct net_device *dev2; 174 atomic_t refcnt; 175}; 176 177static inline struct x25_sock *x25_sk(const struct sock *sk) 178{ 179 return (struct x25_sock *)sk; 180} 181 182/* af_x25.c */ 183extern int sysctl_x25_restart_request_timeout; 184extern int sysctl_x25_call_request_timeout; 185extern int sysctl_x25_reset_request_timeout; 186extern int sysctl_x25_clear_request_timeout; 187extern int sysctl_x25_ack_holdback_timeout; 188extern int sysctl_x25_forward; 189 190extern int x25_parse_address_block(struct sk_buff *skb, 191 struct x25_address *called_addr, 192 struct x25_address *calling_addr); 193 194extern int x25_addr_ntoa(unsigned char *, struct x25_address *, 195 struct x25_address *); 196extern int x25_addr_aton(unsigned char *, struct x25_address *, 197 struct x25_address *); 198extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *); 199extern void x25_destroy_socket_from_timer(struct sock *); 200extern int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int); 201extern void x25_kill_by_neigh(struct x25_neigh *); 202 203/* x25_dev.c */ 204extern void x25_send_frame(struct sk_buff *, struct x25_neigh *); 205extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); 206extern void x25_establish_link(struct x25_neigh *); 207extern void x25_terminate_link(struct x25_neigh *); 208 209/* x25_facilities.c */ 210extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, 211 struct x25_dte_facilities *, unsigned long *); 212extern int x25_create_facilities(unsigned char *, struct x25_facilities *, 213 struct x25_dte_facilities *, unsigned long); 214extern int x25_negotiate_facilities(struct sk_buff *, struct sock *, 215 struct x25_facilities *, 216 struct x25_dte_facilities *); 217extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *); 218 219/* x25_forward.c */ 220extern void x25_clear_forward_by_lci(unsigned int lci); 221extern void x25_clear_forward_by_dev(struct net_device *); 222extern int x25_forward_data(int, struct x25_neigh *, struct sk_buff *); 223extern int x25_forward_call(struct x25_address *, struct x25_neigh *, 224 struct sk_buff *, int); 225 226/* x25_in.c */ 227extern int x25_process_rx_frame(struct sock *, struct sk_buff *); 228extern int x25_backlog_rcv(struct sock *, struct sk_buff *); 229 230/* x25_link.c */ 231extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short); 232extern void x25_link_device_up(struct net_device *); 233extern void x25_link_device_down(struct net_device *); 234extern void x25_link_established(struct x25_neigh *); 235extern void x25_link_terminated(struct x25_neigh *); 236extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char); 237extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *); 238extern int x25_subscr_ioctl(unsigned int, void __user *); 239extern struct x25_neigh *x25_get_neigh(struct net_device *); 240extern void x25_link_free(void); 241 242/* x25_neigh.c */ 243static __inline__ void x25_neigh_hold(struct x25_neigh *nb) 244{ 245 atomic_inc(&nb->refcnt); 246} 247 248static __inline__ void x25_neigh_put(struct x25_neigh *nb) 249{ 250 if (atomic_dec_and_test(&nb->refcnt)) 251 kfree(nb); 252} 253 254/* x25_out.c */ 255extern int x25_output(struct sock *, struct sk_buff *); 256extern void x25_kick(struct sock *); 257extern void x25_enquiry_response(struct sock *); 258 259/* x25_route.c */ 260extern struct x25_route *x25_get_route(struct x25_address *addr); 261extern struct net_device *x25_dev_get(char *); 262extern void x25_route_device_down(struct net_device *dev); 263extern int x25_route_ioctl(unsigned int, void __user *); 264extern void x25_route_free(void); 265 266static __inline__ void x25_route_hold(struct x25_route *rt) 267{ 268 atomic_inc(&rt->refcnt); 269} 270 271static __inline__ void x25_route_put(struct x25_route *rt) 272{ 273 if (atomic_dec_and_test(&rt->refcnt)) 274 kfree(rt); 275} 276 277/* x25_subr.c */ 278extern void x25_clear_queues(struct sock *); 279extern void x25_frames_acked(struct sock *, unsigned short); 280extern void x25_requeue_frames(struct sock *); 281extern int x25_validate_nr(struct sock *, unsigned short); 282extern void x25_write_internal(struct sock *, int); 283extern int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *); 284extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char); 285 286/* x25_timer.c */ 287extern void x25_init_timers(struct sock *sk); 288extern void x25_start_heartbeat(struct sock *); 289extern void x25_start_t2timer(struct sock *); 290extern void x25_start_t21timer(struct sock *); 291extern void x25_start_t22timer(struct sock *); 292extern void x25_start_t23timer(struct sock *); 293extern void x25_stop_heartbeat(struct sock *); 294extern void x25_stop_timer(struct sock *); 295extern unsigned long x25_display_timer(struct sock *); 296extern void x25_check_rbuf(struct sock *); 297 298/* sysctl_net_x25.c */ 299#ifdef CONFIG_SYSCTL 300extern void x25_register_sysctl(void); 301extern void x25_unregister_sysctl(void); 302#else 303static inline void x25_register_sysctl(void) {}; 304static inline void x25_unregister_sysctl(void) {}; 305#endif /* CONFIG_SYSCTL */ 306 307struct x25_skb_cb { 308 unsigned flags; 309}; 310#define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb)) 311 312extern struct hlist_head x25_list; 313extern rwlock_t x25_list_lock; 314extern struct list_head x25_route_list; 315extern rwlock_t x25_route_list_lock; 316extern struct list_head x25_forward_list; 317extern rwlock_t x25_forward_list_lock; 318 319extern int x25_proc_init(void); 320extern void x25_proc_exit(void); 321#endif 322